S-90128A621 3/8"-16 x 5/8" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc-plated alloy steel extends service life in demanding industrial environments.
- Precise Class 3A thread fit provides secure, vibration-resistant connections for critical assemblies.
- Hex socket drive design allows for high-torque installation in confined spaces with standard tools.
- Fully threaded shank offers maximum grip length and adjustment flexibility across various material thicknesses.
- Rockwell C37 hardness rating maintains thread integrity and prevents stripping during repeated use.
- Coarse UNC threading enables quick installation and superior resistance to loosening under dynamic loads.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these socket head cap screws deliver critical performance where standard fasteners fail. The zinc-plated alloy steel construction provides essential corrosion protection for machinery, automotive assemblies, and structural frameworks exposed to harsh conditions. The 3/8"-16 UNC coarse thread configuration ensures rapid installation in production environments while maintaining Class 3A thread fit precision for vibration-prone equipment. The hex socket drive accommodates high torque values without cam-out, making these fasteners ideal for high-strength clamping applications where space constraints limit tool access. With fully threaded design, these screws distribute clamping force evenly across the entire engagement length, preventing joint relaxation in dynamic load scenarios.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with Class 3A thread fit tolerance for precision engagement. Features 3/8"-16 UNC coarse threads with right-hand orientation and standard socket head profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 5/8" length provides optimal engagement for various material thicknesses while maintaining the specified 170,000 PSI tensile strength and Rockwell C37 hardness throughout the fastener.
